Who are the top contractors for Department of the Interior?
A direct answer for Department of the Interior contractor spending, with supporting agency and ranking links.
Direct answer
GUIDEHOUSE INC. is the top listed contractor for Department of the Interior, with $402,840,394 in ingested obligations.
Answer Facts
Agency obligations$4,480,142,612
Award records1,035
Top contractorGUIDEHOUSE INC.
Top NAICS541512 - COMPUTER SYSTEMS DESIGN SERVICES
Which market category matters most for Department of the Interior?
541512 - COMPUTER SYSTEMS DESIGN SERVICES is the largest visible NAICS category for Department of the Interior at $899,038,321.
Source: USAspending.gov. Last updated from ingested federal spending data: May 7, 2026.